Add event block GraphQL queries and methods to LedgerClient

[jfrench9]

Summary

Introduces event block query support to the LedgerClient by adding new GraphQL queries and corresponding client methods. This feature extends the ledger module's capabilities to retrieve and interact with event block data through the GraphQL API.

Key Accomplishments

• New GraphQL Queries: Added event block query definitions to the ledger GraphQL queries module (robosystems_client/graphql/queries/ledger/__init__.py), providing the query structures needed to fetch event block data from the API.
• LedgerClient Methods: Extended LedgerClient with new methods for executing event block queries, enabling consumers of the client library to programmatically retrieve event block information (~72 lines of new client logic).
• Comprehensive Test Coverage: Added 153 lines of tests in test_ledger_client.py covering the new event block query methods, ensuring correctness and reliability of the new functionality.

Changes Breakdown

Area	Details
Client Layer	New event block methods added to LedgerClient
GraphQL Queries	Event block query definitions added to ledger query module
Tests	Full unit test coverage for all new client methods

Breaking Changes

None. This is a purely additive change that introduces new methods and queries without modifying existing interfaces.

Testing Notes

• New unit tests have been added to tests/test_ledger_client.py covering the event block query functionality.
• All new methods should be validated against both mocked responses and, where applicable, integration environments to ensure query compatibility with the backend schema.
• Reviewers should verify that the GraphQL query fields and structure align with the current backend schema definition for event blocks.

Infrastructure Considerations

• Ensure that the target GraphQL backend supports the event block schema/types referenced by the new queries before deploying consumers that rely on this functionality.
• No new dependencies or configuration changes are required; this leverages the existing GraphQL client infrastructure.

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🤖 Generated with Claude Code

Branch Info:

• Source: feature/event-block-graphql
• Target: main
• Type: feature

Co-Authored-By: Claude noreply@anthropic.com